./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d8908adfa5a1758f016a2fa64af2c05db2b3cc5d1fb9ac5b8aa70e5689b8434 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:30:01,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:30:01,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:30:02,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:30:02,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:30:02,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:30:02,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:30:02,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:30:02,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:30:02,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:30:02,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:30:02,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:30:02,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:30:02,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:30:02,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:30:02,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:30:02,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:30:02,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:30:02,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:30:02,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:30:02,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:30:02,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:30:02,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:30:02,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:30:02,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:30:02,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:30:02,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:30:02,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:30:02,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:30:02,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:30:02,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:30:02,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:30:02,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:30:02,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:30:02,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:30:02,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:30:02,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:30:02,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:30:02,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:30:02,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:30:02,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:30:02,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:30:02,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:30:02,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:30:02,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:30:02,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:30:02,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:30:02,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:30:02,180 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:30:02,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:30:02,180 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:30:02,180 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:30:02,182 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:30:02,182 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:30:02,182 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:30:02,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:30:02,183 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:30:02,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:30:02,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:30:02,184 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:30:02,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:30:02,185 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:30:02,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:30:02,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:30:02,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:30:02,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:30:02,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:30:02,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:30:02,186 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:30:02,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:30:02,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:30:02,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:30:02,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:30:02,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:30:02,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:30:02,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:30:02,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:30:02,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:30:02,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:30:02,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:30:02,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:30:02,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:30:02,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:30:02,190 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d8908adfa5a1758f016a2fa64af2c05db2b3cc5d1fb9ac5b8aa70e5689b8434 [2021-11-25 18:30:02,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:30:02,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:30:02,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:30:02,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:30:02,534 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:30:02,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c [2021-11-25 18:30:02,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/data/175f6886f/08b650db382d4606af35020b193126b3/FLAGd2628d3c3 [2021-11-25 18:30:03,382 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:30:03,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c [2021-11-25 18:30:03,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/data/175f6886f/08b650db382d4606af35020b193126b3/FLAGd2628d3c3 [2021-11-25 18:30:03,536 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/data/175f6886f/08b650db382d4606af35020b193126b3 [2021-11-25 18:30:03,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:30:03,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:30:03,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:30:03,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:30:03,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:30:03,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:03" (1/1) ... [2021-11-25 18:30:03,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c2a10f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:03, skipping insertion in model container [2021-11-25 18:30:03,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:03" (1/1) ... [2021-11-25 18:30:03,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:30:03,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:30:04,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c[72622,72635] [2021-11-25 18:30:04,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:30:04,536 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:30:04,673 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/sv-benchmarks/c/product-lines/email_spec7_productSimulator.cil.c[72622,72635] [2021-11-25 18:30:04,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:30:04,729 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:30:04,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04 WrapperNode [2021-11-25 18:30:04,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:30:04,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:30:04,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:30:04,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:30:04,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,875 INFO L137 Inliner]: procedures = 151, calls = 280, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1299 [2021-11-25 18:30:04,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:30:04,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:30:04,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:30:04,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:30:04,888 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:04,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:05,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:05,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:05,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:30:05,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:30:05,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:30:05,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:30:05,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (1/1) ... [2021-11-25 18:30:05,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:30:05,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:05,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:30:05,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:30:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2021-11-25 18:30:05,165 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2021-11-25 18:30:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2021-11-25 18:30:05,165 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2021-11-25 18:30:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2021-11-25 18:30:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2021-11-25 18:30:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2021-11-25 18:30:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2021-11-25 18:30:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2021-11-25 18:30:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2021-11-25 18:30:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2021-11-25 18:30:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2021-11-25 18:30:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2021-11-25 18:30:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2021-11-25 18:30:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2021-11-25 18:30:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2021-11-25 18:30:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-11-25 18:30:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-11-25 18:30:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2021-11-25 18:30:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2021-11-25 18:30:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-11-25 18:30:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-11-25 18:30:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-11-25 18:30:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-11-25 18:30:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2021-11-25 18:30:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2021-11-25 18:30:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2021-11-25 18:30:05,169 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2021-11-25 18:30:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2021-11-25 18:30:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2021-11-25 18:30:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2021-11-25 18:30:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2021-11-25 18:30:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2021-11-25 18:30:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2021-11-25 18:30:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2021-11-25 18:30:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2021-11-25 18:30:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-25 18:30:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2021-11-25 18:30:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2021-11-25 18:30:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2021-11-25 18:30:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2021-11-25 18:30:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2021-11-25 18:30:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2021-11-25 18:30:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-11-25 18:30:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-11-25 18:30:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2021-11-25 18:30:05,178 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2021-11-25 18:30:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:30:05,180 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2021-11-25 18:30:05,180 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2021-11-25 18:30:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2021-11-25 18:30:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2021-11-25 18:30:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2021-11-25 18:30:05,182 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2021-11-25 18:30:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2021-11-25 18:30:05,183 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2021-11-25 18:30:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2021-11-25 18:30:05,183 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2021-11-25 18:30:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2021-11-25 18:30:05,184 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2021-11-25 18:30:05,184 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2021-11-25 18:30:05,184 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2021-11-25 18:30:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2021-11-25 18:30:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2021-11-25 18:30:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-11-25 18:30:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-11-25 18:30:05,185 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2021-11-25 18:30:05,185 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2021-11-25 18:30:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-11-25 18:30:05,186 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-11-25 18:30:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2021-11-25 18:30:05,186 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2021-11-25 18:30:05,186 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2021-11-25 18:30:05,187 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2021-11-25 18:30:05,188 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2021-11-25 18:30:05,188 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2021-11-25 18:30:05,188 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2021-11-25 18:30:05,188 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2021-11-25 18:30:05,188 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-11-25 18:30:05,188 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-11-25 18:30:05,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:30:05,189 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2021-11-25 18:30:05,189 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2021-11-25 18:30:05,189 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2021-11-25 18:30:05,190 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2021-11-25 18:30:05,190 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-25 18:30:05,190 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-25 18:30:05,191 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2021-11-25 18:30:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2021-11-25 18:30:05,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:30:05,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:30:05,470 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:30:05,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:30:06,704 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:30:07,309 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:30:07,310 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:30:07,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:07 BoogieIcfgContainer [2021-11-25 18:30:07,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:30:07,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:30:07,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:30:07,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:30:07,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:30:03" (1/3) ... [2021-11-25 18:30:07,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e53eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:07, skipping insertion in model container [2021-11-25 18:30:07,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:04" (2/3) ... [2021-11-25 18:30:07,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e53eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:07, skipping insertion in model container [2021-11-25 18:30:07,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:07" (3/3) ... [2021-11-25 18:30:07,324 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_productSimulator.cil.c [2021-11-25 18:30:07,333 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:30:07,334 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:30:07,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:30:07,399 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:30:07,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:30:07,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2021-11-25 18:30:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 18:30:07,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:07,449 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:07,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:07,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1058820502, now seen corresponding path program 1 times [2021-11-25 18:30:07,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:07,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807789509] [2021-11-25 18:30:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:07,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 18:30:08,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:08,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807789509] [2021-11-25 18:30:08,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807789509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:08,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:08,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:30:08,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832988746] [2021-11-25 18:30:08,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:08,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:30:08,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:30:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:30:08,107 INFO L87 Difference]: Start difference. First operand has 377 states, 223 states have (on average 1.3318385650224216) internal successors, (297), 243 states have internal predecessors, (297), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:30:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:08,548 INFO L93 Difference]: Finished difference Result 726 states and 994 transitions. [2021-11-25 18:30:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:30:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 110 [2021-11-25 18:30:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:08,572 INFO L225 Difference]: With dead ends: 726 [2021-11-25 18:30:08,572 INFO L226 Difference]: Without dead ends: 374 [2021-11-25 18:30:08,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:30:08,587 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 6 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 1371 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:30:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-25 18:30:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-25 18:30:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 240 states have internal predecessors, (285), 109 states have call successors, (109), 43 states have call predecessors, (109), 43 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-25 18:30:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 502 transitions. [2021-11-25 18:30:08,709 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 502 transitions. Word has length 110 [2021-11-25 18:30:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 502 transitions. [2021-11-25 18:30:08,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:30:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 502 transitions. [2021-11-25 18:30:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-25 18:30:08,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:08,730 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:08,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:30:08,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 699274038, now seen corresponding path program 1 times [2021-11-25 18:30:08,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631661933] [2021-11-25 18:30:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:08,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 18:30:08,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:08,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631661933] [2021-11-25 18:30:08,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631661933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:08,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:08,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:08,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944070921] [2021-11-25 18:30:08,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:08,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:08,968 INFO L87 Difference]: Start difference. First operand 374 states and 502 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 18:30:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:09,198 INFO L93 Difference]: Finished difference Result 719 states and 973 transitions. [2021-11-25 18:30:09,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:09,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 121 [2021-11-25 18:30:09,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:09,205 INFO L225 Difference]: With dead ends: 719 [2021-11-25 18:30:09,217 INFO L226 Difference]: Without dead ends: 374 [2021-11-25 18:30:09,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:09,223 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 467 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:09,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 460 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-25 18:30:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-25 18:30:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 222 states have (on average 1.2747747747747749) internal successors, (283), 239 states have internal predecessors, (283), 107 states have call successors, (107), 44 states have call predecessors, (107), 44 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-25 18:30:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 496 transitions. [2021-11-25 18:30:09,304 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 496 transitions. Word has length 121 [2021-11-25 18:30:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:09,307 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 496 transitions. [2021-11-25 18:30:09,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-25 18:30:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 496 transitions. [2021-11-25 18:30:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 18:30:09,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:09,322 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:30:09,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1531973111, now seen corresponding path program 1 times [2021-11-25 18:30:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:09,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991710038] [2021-11-25 18:30:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:09,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 18:30:09,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:09,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991710038] [2021-11-25 18:30:09,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991710038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:09,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:09,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:09,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156736034] [2021-11-25 18:30:09,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:09,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:09,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:09,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:09,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:09,528 INFO L87 Difference]: Start difference. First operand 374 states and 496 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:30:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:09,810 INFO L93 Difference]: Finished difference Result 1052 states and 1418 transitions. [2021-11-25 18:30:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:09,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 117 [2021-11-25 18:30:09,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:09,820 INFO L225 Difference]: With dead ends: 1052 [2021-11-25 18:30:09,820 INFO L226 Difference]: Without dead ends: 707 [2021-11-25 18:30:09,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:09,824 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 468 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:09,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 963 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:30:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-11-25 18:30:09,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 705. [2021-11-25 18:30:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 418 states have (on average 1.2727272727272727) internal successors, (532), 448 states have internal predecessors, (532), 199 states have call successors, (199), 87 states have call predecessors, (199), 87 states have return successors, (210), 196 states have call predecessors, (210), 197 states have call successors, (210) [2021-11-25 18:30:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 941 transitions. [2021-11-25 18:30:09,894 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 941 transitions. Word has length 117 [2021-11-25 18:30:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:09,894 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 941 transitions. [2021-11-25 18:30:09,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:30:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 941 transitions. [2021-11-25 18:30:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 18:30:09,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:09,900 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:09,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:30:09,900 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:09,901 INFO L85 PathProgramCache]: Analyzing trace with hash 762482393, now seen corresponding path program 1 times [2021-11-25 18:30:09,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619218120] [2021-11-25 18:30:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:09,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 18:30:09,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:09,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619218120] [2021-11-25 18:30:09,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619218120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:09,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:09,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:09,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047299288] [2021-11-25 18:30:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:09,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:09,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:09,994 INFO L87 Difference]: Start difference. First operand 705 states and 941 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 18:30:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:10,156 INFO L93 Difference]: Finished difference Result 707 states and 942 transitions. [2021-11-25 18:30:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2021-11-25 18:30:10,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:10,162 INFO L225 Difference]: With dead ends: 707 [2021-11-25 18:30:10,162 INFO L226 Difference]: Without dead ends: 374 [2021-11-25 18:30:10,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,175 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 448 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:10,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 463 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-25 18:30:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2021-11-25 18:30:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 223 states have (on average 1.2556053811659194) internal successors, (280), 238 states have internal predecessors, (280), 105 states have call successors, (105), 45 states have call predecessors, (105), 45 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2021-11-25 18:30:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 489 transitions. [2021-11-25 18:30:10,230 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 489 transitions. Word has length 123 [2021-11-25 18:30:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:10,231 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 489 transitions. [2021-11-25 18:30:10,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 18:30:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 489 transitions. [2021-11-25 18:30:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 18:30:10,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:10,235 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:10,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:30:10,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2010105046, now seen corresponding path program 1 times [2021-11-25 18:30:10,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:10,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732195900] [2021-11-25 18:30:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:10,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-25 18:30:10,343 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:10,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732195900] [2021-11-25 18:30:10,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732195900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:10,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:10,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:10,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966965911] [2021-11-25 18:30:10,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:10,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:10,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,347 INFO L87 Difference]: Start difference. First operand 374 states and 489 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 18:30:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:10,504 INFO L93 Difference]: Finished difference Result 709 states and 925 transitions. [2021-11-25 18:30:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2021-11-25 18:30:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:10,509 INFO L225 Difference]: With dead ends: 709 [2021-11-25 18:30:10,509 INFO L226 Difference]: Without dead ends: 377 [2021-11-25 18:30:10,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,512 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 431 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:10,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 448 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-25 18:30:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 371. [2021-11-25 18:30:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 223 states have (on average 1.2062780269058295) internal successors, (269), 233 states have internal predecessors, (269), 102 states have call successors, (102), 45 states have call predecessors, (102), 45 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-25 18:30:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 472 transitions. [2021-11-25 18:30:10,543 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 472 transitions. Word has length 123 [2021-11-25 18:30:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:10,544 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 472 transitions. [2021-11-25 18:30:10,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-25 18:30:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 472 transitions. [2021-11-25 18:30:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 18:30:10,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:10,549 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:10,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:30:10,549 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:10,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:10,550 INFO L85 PathProgramCache]: Analyzing trace with hash 384449674, now seen corresponding path program 1 times [2021-11-25 18:30:10,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:10,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101050113] [2021-11-25 18:30:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:10,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 18:30:10,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101050113] [2021-11-25 18:30:10,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101050113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:10,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403867879] [2021-11-25 18:30:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:10,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,658 INFO L87 Difference]: Start difference. First operand 371 states and 472 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:30:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:10,821 INFO L93 Difference]: Finished difference Result 585 states and 738 transitions. [2021-11-25 18:30:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:10,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 140 [2021-11-25 18:30:10,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:10,827 INFO L225 Difference]: With dead ends: 585 [2021-11-25 18:30:10,827 INFO L226 Difference]: Without dead ends: 373 [2021-11-25 18:30:10,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,830 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 0 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:10,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 837 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-25 18:30:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2021-11-25 18:30:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 225 states have (on average 1.2044444444444444) internal successors, (271), 235 states have internal predecessors, (271), 102 states have call successors, (102), 45 states have call predecessors, (102), 45 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2021-11-25 18:30:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2021-11-25 18:30:10,862 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 140 [2021-11-25 18:30:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:10,863 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2021-11-25 18:30:10,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:30:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2021-11-25 18:30:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 18:30:10,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:10,867 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:10,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:30:10,868 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2021297993, now seen corresponding path program 1 times [2021-11-25 18:30:10,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:10,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293963451] [2021-11-25 18:30:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:10,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:30:10,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293963451] [2021-11-25 18:30:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293963451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:10,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:10,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:30:10,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471425916] [2021-11-25 18:30:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:10,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:30:10,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:30:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:10,989 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:30:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:11,166 INFO L93 Difference]: Finished difference Result 744 states and 971 transitions. [2021-11-25 18:30:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:30:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 140 [2021-11-25 18:30:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:11,172 INFO L225 Difference]: With dead ends: 744 [2021-11-25 18:30:11,172 INFO L226 Difference]: Without dead ends: 440 [2021-11-25 18:30:11,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:30:11,175 INFO L933 BasicCegarLoop]: 445 mSDtfsCounter, 76 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:11,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 857 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-25 18:30:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 435. [2021-11-25 18:30:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 273 states have (on average 1.249084249084249) internal successors, (341), 283 states have internal predecessors, (341), 116 states have call successors, (116), 45 states have call predecessors, (116), 45 states have return successors, (115), 114 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-25 18:30:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 572 transitions. [2021-11-25 18:30:11,219 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 572 transitions. Word has length 140 [2021-11-25 18:30:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 572 transitions. [2021-11-25 18:30:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:30:11,220 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 572 transitions. [2021-11-25 18:30:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 18:30:11,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:11,224 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:30:11,225 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:11,226 INFO L85 PathProgramCache]: Analyzing trace with hash 274493063, now seen corresponding path program 1 times [2021-11-25 18:30:11,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:11,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289805530] [2021-11-25 18:30:11,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:11,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:30:11,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:11,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289805530] [2021-11-25 18:30:11,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289805530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976279453] [2021-11-25 18:30:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:11,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:11,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:11,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:11,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:30:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:30:11,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:30:12,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:30:12,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976279453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:30:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296150922] [2021-11-25 18:30:12,562 INFO L159 IcfgInterpreter]: Started Sifa with 116 locations of interest [2021-11-25 18:30:12,563 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:12,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:30:12,577 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:30:12,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:31:41,705 INFO L197 IcfgInterpreter]: Interpreting procedure setup_rjh__before__Keys with input of size 688 for LOIs [2021-11-25 18:31:42,933 INFO L197 IcfgInterpreter]: Interpreting procedure setup_bob__before__Keys with input of size 495 for LOIs [2021-11-25 18:31:44,370 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 471 for LOIs [2021-11-25 18:32:13,129 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 461 for LOIs [2021-11-25 18:32:13,394 INFO L197 IcfgInterpreter]: Interpreting procedure setup_chuck__before__Keys with input of size 248 for LOIs [2021-11-25 18:32:14,178 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 437 for LOIs [2021-11-25 18:32:14,439 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 441 for LOIs [2021-11-25 18:32:14,708 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 442 for LOIs [2021-11-25 18:32:14,977 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 469 for LOIs [2021-11-25 18:32:22,159 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 431 for LOIs [2021-11-25 18:32:22,402 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__Sign with input of size 453 for LOIs [2021-11-25 18:32:23,116 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__AddressBook with input of size 451 for LOIs [2021-11-25 18:32:23,812 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__Encrypt with input of size 449 for LOIs [2021-11-25 18:32:28,661 INFO L197 IcfgInterpreter]: Interpreting procedure incoming__before__Decrypt with input of size 273 for LOIs [2021-11-25 18:32:29,459 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable with input of size 255 for LOIs [2021-11-25 18:32:30,056 INFO L197 IcfgInterpreter]: Interpreting procedure isReadable__before__Encrypt with input of size 255 for LOIs [2021-11-25 18:32:30,104 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 255 for LOIs [2021-11-25 18:32:30,160 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 259 for LOIs [2021-11-25 18:32:30,297 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:33:27,705 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 508 DAG size of output: 500 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:33:33,584 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 512 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:33:55,685 WARN L227 SmtUtils]: Spent 9.73s on a formula simplification. DAG size of input: 727 DAG size of output: 543 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:01,622 WARN L227 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 442 DAG size of output: 337 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:07,842 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 466 DAG size of output: 357 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:16,452 WARN L227 SmtUtils]: Spent 7.75s on a formula simplification. DAG size of input: 716 DAG size of output: 500 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:27,742 WARN L227 SmtUtils]: Spent 9.54s on a formula simplification. DAG size of input: 722 DAG size of output: 586 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:35,679 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 726 DAG size of output: 523 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:34:42,978 WARN L227 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 688 DAG size of output: 519 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:05,756 WARN L227 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 557 DAG size of output: 409 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:15,264 WARN L227 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 558 DAG size of output: 379 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:24,912 WARN L227 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 560 DAG size of output: 381 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:33,063 WARN L227 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 560 DAG size of output: 347 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:40,919 WARN L227 SmtUtils]: Spent 6.93s on a formula simplification. DAG size of input: 558 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:47,020 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 556 DAG size of output: 367 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:35:56,375 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 559 DAG size of output: 380 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:29,641 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 540 DAG size of output: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:36:57,124 WARN L227 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 506 DAG size of output: 384 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:04,035 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 557 DAG size of output: 415 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:37:54,075 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 494 DAG size of output: 364 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:00,697 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 498 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:20,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [296150922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:38:20,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:38:20,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [4, 4, 4] total 102 [2021-11-25 18:38:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184406056] [2021-11-25 18:38:20,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:38:20,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-25 18:38:20,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:38:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-25 18:38:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=9937, Unknown=0, NotChecked=0, Total=10302 [2021-11-25 18:38:20,651 INFO L87 Difference]: Start difference. First operand 435 states and 572 transitions. Second operand has 97 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 62 states have internal predecessors, (74), 28 states have call successors, (30), 18 states have call predecessors, (30), 12 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-25 18:38:27,091 WARN L227 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 575 DAG size of output: 498 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:39,505 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 573 DAG size of output: 502 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:45,646 WARN L227 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 572 DAG size of output: 504 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:52,070 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 571 DAG size of output: 506 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:38:58,650 WARN L227 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 570 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:04,908 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 569 DAG size of output: 510 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:11,622 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 568 DAG size of output: 512 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:26,242 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 492 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:39:32,546 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 494 DAG size of output: 361 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:40:06,589 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 491 DAG size of output: 349 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:40:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:53,116 INFO L93 Difference]: Finished difference Result 1191 states and 1648 transitions. [2021-11-25 18:40:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-25 18:40:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 62 states have internal predecessors, (74), 28 states have call successors, (30), 18 states have call predecessors, (30), 12 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) Word has length 141 [2021-11-25 18:40:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:53,124 INFO L225 Difference]: With dead ends: 1191 [2021-11-25 18:40:53,124 INFO L226 Difference]: Without dead ends: 782 [2021-11-25 18:40:53,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 319 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5193 ImplicationChecksByTransitivity, 439.5s TimeCoverageRelationStatistics Valid=522, Invalid=13284, Unknown=0, NotChecked=0, Total=13806 [2021-11-25 18:40:53,132 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 698 mSDsluCounter, 12640 mSDsCounter, 0 mSdLazyCounter, 18836 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 12767 SdHoareTripleChecker+Invalid, 18947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 18836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:53,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 12767 Invalid, 18947 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [111 Valid, 18836 Invalid, 0 Unknown, 0 Unchecked, 62.3s Time] [2021-11-25 18:40:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-25 18:40:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 603. [2021-11-25 18:40:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 402 states have (on average 1.2835820895522387) internal successors, (516), 413 states have internal predecessors, (516), 139 states have call successors, (139), 67 states have call predecessors, (139), 61 states have return successors, (138), 130 states have call predecessors, (138), 138 states have call successors, (138) [2021-11-25 18:40:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 793 transitions. [2021-11-25 18:40:53,378 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 793 transitions. Word has length 141 [2021-11-25 18:40:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:53,379 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 793 transitions. [2021-11-25 18:40:53,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 62 states have internal predecessors, (74), 28 states have call successors, (30), 18 states have call predecessors, (30), 12 states have return successors, (24), 24 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-25 18:40:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 793 transitions. [2021-11-25 18:40:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-25 18:40:53,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:53,385 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:53,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:40:53,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:53,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:53,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1955062501, now seen corresponding path program 1 times [2021-11-25 18:40:53,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633883670] [2021-11-25 18:40:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:53,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 18:40:53,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:53,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633883670] [2021-11-25 18:40:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633883670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:40:53,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:40:53,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:40:53,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512665272] [2021-11-25 18:40:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:40:53,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:40:53,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:40:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:40:53,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:53,720 INFO L87 Difference]: Start difference. First operand 603 states and 793 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:40:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:40:54,210 INFO L93 Difference]: Finished difference Result 1515 states and 2031 transitions. [2021-11-25 18:40:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:40:54,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 148 [2021-11-25 18:40:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:40:54,220 INFO L225 Difference]: With dead ends: 1515 [2021-11-25 18:40:54,220 INFO L226 Difference]: Without dead ends: 952 [2021-11-25 18:40:54,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:40:54,224 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 445 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:40:54,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1155 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:40:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-25 18:40:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 950. [2021-11-25 18:40:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 620 states have (on average 1.2790322580645161) internal successors, (793), 638 states have internal predecessors, (793), 230 states have call successors, (230), 105 states have call predecessors, (230), 99 states have return successors, (240), 219 states have call predecessors, (240), 228 states have call successors, (240) [2021-11-25 18:40:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1263 transitions. [2021-11-25 18:40:54,563 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1263 transitions. Word has length 148 [2021-11-25 18:40:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:40:54,564 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1263 transitions. [2021-11-25 18:40:54,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:40:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1263 transitions. [2021-11-25 18:40:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 18:40:54,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:40:54,570 INFO L514 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:40:54,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:40:54,571 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION === [incoming__before__DecryptErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:40:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:40:54,571 INFO L85 PathProgramCache]: Analyzing trace with hash -804817033, now seen corresponding path program 1 times [2021-11-25 18:40:54,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:40:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127594320] [2021-11-25 18:40:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:54,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:40:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:40:54,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:40:54,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127594320] [2021-11-25 18:40:54,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127594320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:40:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867161716] [2021-11-25 18:40:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:40:54,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:40:54,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:40:54,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:40:54,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a149fbc6-2503-4e73-adc6-37b398fc12d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:40:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:40:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:40:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:40:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:40:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:40:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-25 18:40:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867161716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:40:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817076959] [2021-11-25 18:40:55,469 INFO L159 IcfgInterpreter]: Started Sifa with 121 locations of interest [2021-11-25 18:40:55,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:40:55,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:40:55,471 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:40:55,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs